Hi ! Yes you can change the CX flight using AA miles. However you cant do that using points of UA or LH when redeeming miles on a carrier other than itself.
<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by uastarflyer:
One point of clarification. On a UA award on UA metal you can change dates, even after departure, with no fee, any number of times. It's a UA award on another *A metal that the above statement is true. I don't know the rules of the other *A programs.
so would the above mean that an AA award on CX metal for example can have date changes after departure? that is a benefit.</font>